A major cost savings would result from using equipment heavier than traditional light rail but lighter than conventional commuter rail cars. The heavier equipment would meet federal guidelines allowing the rail system to use CSX freight tracks, though a deal with CSX still would have to be worked out.
It probably makes sense to have non-electric LRT as a hedge against hurricane damage. Galveston, TX's replica trolley operation went wireless for that very reason.
Of course for airport service, monorail, IMO, would be the most attractive mode. Trains would occupy a smaller footprint while passing over expensive land and would survive most hurricane onslaughts.
Sloan
http://www2.tbo.com/...rail-ar-576810/